Paper-cutting machine.



- No. 744,754. PATENTED NOV..24, 1903. W. H. HANSBLL.

PAPER CUTTING MACHINE.

APPLICATION FILED D SC. 8, I902.

v 2 SHEETS-SHEET 1.

N0 MODEL.

flfie'isf I 1 hive/{for I THE "cams wzrzizs co. hum-undo. wAs-.mirrou,n. c.

No. 744,754. PATENTED NOV. 24, 19.03.

- W. H. HANSBIJL.

PAPER CUTTING MACHINE.

APPLICATION FILED DEC. 8, 1902. I

N0 MODEL. I 2 SHBETS SHEET 2.

UNITED STATES Patented November 24, 1903.

PATENT OFFICE.

WILLIAM HENRY HANSELL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HENRYL. EGBERT, OF NEW YORK, N. Y.

PAPER-CUTTING MACHINE.

' SPECIFICATION forming part of Letters Patent No. 744,754, datedNovember 24, 1903.

v Application f led December 8, 1902. Serial No. 134,228. (No model) ITo all whom it may concern Be it known that 1, WILLIAM HENRY HAN- SELL,of the city and county of Philadelphia, State of Pennsylvania, haveinvented an Improvement in Paper- Cutting Machines, of which thefollowing is a specification. I

It is one of the objects of my invention to enable the clamp whoseoperations are controlled by the knife-bar to impose a constant anduniform clamping pressure upon 'the paper irrespective of the extent ofmovement of the knife or the depth of the out.

It is also an object of the invention to produce a uniform clampingpressure upon thepaper irrespective of the height of the pile,

so that the same clamping pressure will be exerted by the clamp whetherthe clamp is acting on a single sheet or on a pile of paper severalinches in height.

The attainment of these'objects insures that the paper may always beclamped with the proper amount of pressure notwithstanding variations inthe height of the pile, and consequentlydefective cutting due to insufiiciency of clamping pressure and injury to the paper due to excess ofclamping pressure are avoided. It also insures uniform cuttingirrespective of the extent of movement ofthe knife or the height of thepile of paper.

It is also an object of my invention to enable the amount of clampingpressure to be adjusted to suit the character-of the paper to be cut, sothat injury from excessive clamping pressure in light paper may beavoided.

It is also an object of my invention to insure the application of thefull clamping pressure before the knife commences its cutting operationand not to release the clamping pressure until the completion of thecutting operation and the knife has commenced to return. i.

In carrying out my invention I employ, in combination with the .usualreciprocating knife-bar and its knife and the clamping-bar and itsclamp, operated by the knife-bar, of pressure-creating devices to imparta constant and uniform pressure to the clampingbar, which are operatedby the knife-bar and controlled by the movements of the clampingbar insuch manner that they are thrown into action when the movement of theclampingcarrying frame.

bar is arrested by the contact of its clamp with the paper, but areuniform in their action and are not affected in the amount of clampingpressure produced by the extent of the movement of the knife-bar.

. The particular pressure-creating devices which I prefer to employ incarrying out my invention consist of friction-creating devices, such asa brake-wheel and brake-band, carried by the clamping-bar andoperated bythe movement of the knife-barwhen the movement of the clamping-bar isarrested by the paper. As the amount of clamping pressure depends whollyupon the amount of friction produced by said friction-creating devices,it is obvious that such pressure will be constant and will not beaffected by the extent of movement of the knife during the act ofcutting or the height of the pile of paper and also that the amount ofthe clamping pressure may be adjusted to suit the character of the paperto be clamped by the adjustment of the friction-creating devices.

The details of my inventionwill be better understood by a reference tothe accompanying drawings.

Figure 1 is a rear elevation ofthe upper portion of a paper-cuttingmachine embodying the invention. Fig. 2 is a front elevation of one endof the clamping-bar. Fig. 3 is a vertical sectional view onthe line 330f Fig. 1. Fig. 4. shows a plan and side elevation of the clutch orvpawl for operating the frictionwheel; Fig. 5 is a detailplan View of thefriction-band. Fig. 6 shows afplan on side elevation of theclutch-operating arm. Fig.

v7 shows a plan and side elevation of the pawl- Fig. '8 is a plan viewof the friction-wheel, and Fig. 9 is a transverse sectional view of thesame on the line 9 9 of Fig. 8.

The clamping-bar a is guided in the usual manner in the vertical guidesat a of the main frame and is operated by the knife-bar 'b, by which itis supported by rollers or studs b on the knife-bar, which engage forkedlevers c on the clamping-bar. Only one pair of these forked, levers androllers is shown in Fig. 2; but it is to be understood that two are usedin practice, one set located at each end. The knife-bar b is operated ithe usual manner to reciprocate vertically and to have a longitudinalmovement. As the means for imparting these movements to the knife-barare usual and well known in the art and form no part of my invention,they are not shown in detail, though one 'of the knife-bar'operatingarms or links I) is shown at one end of the machine in Fig. 1.

The forked levers care provided with toothed segments (2, which engage apinion e, carried on a pin a, journaled in the clamping-bar. Secured tothe outer end of the pin (2 is a cross-bar f, provided on its ends withlugs g.

The pin 8 is journaled in a hub j of the clamping-bar, and journaledloosely on the hub 7" is a band or brake wheel j, which is embraced by abrake-band k.

A ring frame it, supported on the hub m of the band or brake wheel,carries two pivoted pawls or dogs 2', which are pivoted at i in recessesi in the ring frame and are adapted when rocked to move inwardly intocontact with the surface of the hub m of the brakewheel.

The pawls or clutches 'i are provided with arms at, having more or lesselongated slots 11, whicjh are engaged by the lugs g of the crossbar Thebrake-band 7c encircles the brake-Wheel with frictional contact, theamount of which may be adjusted to produce the desired pressure in theclamping-bar. In the construction shown the brake-band consists of twomembers k hinged together at 70 One end of the brake-band is fastened tothe frame of the clamping-bar, as at 70 and the other end is connectedwith adjustable devices to regulate the tension, which, as shown,consist of a longitudinally adjustable rod 0. The rod is shown providedon its end with a strap 0, encircling an eccentric p on a crankarm 19,journaled in the clamping-bar and provided with a pin 13 which isengaged by a jaw 15 of a link t, hinged at t to a crankarm 25 of a pin ijonrnaled in the clampingbar frame and carrying a wheel 15, by which thearm i may be adjusted to adjust the rod and the tension of thebrake-bands 7c 70.

In the machine shown in the drawings there are two of thesepressurecreating devices, and the brake-band of each is connected withthe rod 0, so that both bands may be adjusted simultaneously andequally. The rod 0 is also made with adjustable sections 0 so that onebrake-band may be adjusted independently of the other to compensate forany inequality in Wear between the two band-wheels or other parts of thetwo pressure-creating devices.

In smaller machines only one of the pressurecreating devices isrequired.

When the clamping-bar and knife-bar are in elevated position, theclamping-bar is supported wholly by the knife-bar by the rollers 19' andpivoted forks c which are held against upward movement by the lugs c,Fig. 2. As

the knife-bar descends it lowers the clamping-bar with it withoutmovement in the pivoted forks 0 until the clamp is in contact with thesurface of the paper. When the movement of the clamping-bar is arrestedby the paper, the knife sis elevated a short distance (in practice aboutan inch)rabove the clamping-surface, and as the knife-bar continues todescend the forks c are rocked by the pins 1) and the pinions e arerotated by the segments d. The rotation of the pinions 6 turns thecross-bars f through the pins 6, and the lugs g of the cross-bars moveinward in the slots n of the pawls, and thus throw the pawls intoengagement with the surface of the hubs in of the bandwheels. Thiscauses the band-wheels to rotate with the pinions e in frictionalcontact'with the brakebands 70, and as the clamping-bar is resting onthe paper the movement of the knife-bar will impart to the clamp apressure proportional to the friction of the brake-bands on theband-wheels.

As the pressure is produced by the friction of the brake-bands on thebandwheels it is constant and uniform and does not increase as the knifecontinues to descend, so that throughout the cutting action the samepressure is maintained.

As the pressure is prod need when the clamping-bar is brought in contactwith the paper and wholly by the action of the brake-bands, it isobvious that the pressure will be the same irrespective of the height ofthe paper or the depth of the out. In practice it has been demonstratedthat exactly the same pressure is produced on a single sheet as on thesurface of a pile several inches high.

By so locating the knife that it is elevated slightly above the clamp,as shown in Fig. 3, the clamping pressure will be applied before theknife comes into cutting action. While the slight lost motion due to themovement of the lugs g in the elongated slots n of the pawls or clutchest' permits a slight movement of the knife after the clamp makes contactwith the paper and before the clamping pressure is applied by theoperation of the friction-creating devices, the extent of this lostmotion is not suflicient to enable the knife to come into cutting actionbefore the clamping pressure is applied; but on the return movement thislost motion is of special advantage, since it enables the knife to riseslightly before the pressure-creating devices are released, and thusinsures the maintenance of the clamping pressure until after the cut isfinished.

On the return movement the segments cl and pinions e are rocked back.This moves the lugs g outward in the slots n and disengages the clutchesi from the hubs m of the band wheels, thus throwing the frictioncreatingdevices out of action.

The details of the construction shown may be varied without departingfrom the spirit of my invention.

What I claim as new, and desire to secure by Letters Patent, is asfollows:

I clamp, and means carried by the knife-bar to operate the clamping-barembracing pressure-creating devices actuated by the stoppage of theclamping-bar to impart a uniform pressure'thereto irrespective of the extent of movement of the knife-bar.

2. In a:paper-cutting machine, the combination with a reciprocatingknife-bar and knife, of a reciprocating clamping-bar and clamp and meanscarried by the knife-bar to operate the clamping-bar embracingpressure-creating devices to impart pressure to the clamping-bar whenthe clamp is in contact with the paper.

3. In a paper-cutting machine, the combi nation with a reciprocatingknifebar and knife, of a reciprocating clamping-bar and clamp, meanscarried by the knife-bar to operate the clamping-bar embracingpressurecreating devices adapted to impart a uniform pressure to theclamping-bar when the movement of the clamping-bar is arrestedirrespective of the extent of movement of the knife-bar, and means toregulate said pressure-creating devices to vary the amount of pressureproduced thereby.

4. In a paper-cutting machine, the combination with a reciprocatingknife-bar and knife, of a reciprocating clamping-bar and clamp operatedby the knife-bar, and frictioncreating devices carried by theclamping-bar and operated by the movement of the knifebar under thecontrol of the reciprocation of the clamping bar, whereby saidfrictioncreating devices are thrown into operation by the movement ofthe knife-bar, when the movement of the clamping-bar is arrested by thepaper, and a uniform pressure isimparted to the clamping-barirrespectiveof the extent of movement of the. knife-bar or the height of the paperbeing out.

5. In a paper-cutting machine, the combination with the reciprocatingknife-bar and knife, of a reciprocating clamping-bar and clamp operatedby the knife-bar, frictioncreating devices carried by the clamping-bar,means operated by the movement of the knife-bar and controlled by themovement of the clamping-bar to operate said frictioncreating deviceswhen the movement of the clamping-bar is arrested, embracing clutchdevices adapted to act upon the frictioncreating devices.

6. In a paper-cutting machine, the combination with the reciprocatingknife-bar and knife, of a reciprocating clamping-bar and clamp'operatedby the knife-bar, friction,-

creating devices carried by the clam ping-bar, means operated by themovement of the knifebar and controlled by the movement of theclamping-bar to operate said friction-creating devices when the movementof the clamp-,

ing-bar is arrested, embracing clutch devices adapted to act upon thefriction-creating de- Vices, said clutch devices having provision forlost motion whereby a slightmovement may be permitted in the knife-barafter the clam ping-bar is arrested before said clutch devices operatethe friction-creating devices.

7. In a paper-cutting machine, the combination with the reciprocatingknife-bar and knife, of a reciprocating clamping-bar and clamp operatedby the knifebar, a brakewheel carried by the clamping-bar, a brakeacting on saidband-wheel to impose a uniform friction thereon when thebrake-wheel is operated, and means operated by the movement of theknife-bar and controlled by the movement of the clamping-bar to rotatesaid brakewheel when the movement of the clampingbar is arrested by thepaper to be cut.

8. In a paper-cutting machine, the combination with the reciprocatingknife-bar and knife, of a reciprocatingclamping-bar and clamp operatedby the knife-bar, a brakewheel carried by the clamping-bar, a brakeacting on said brake-wheel to impose a uniform friction thereon when thebrake-wheel is operated, clutch devices adapted to act on thebrake-wheel, operated by the movement of the knife-bar and controlled bythe movement of the clamping-bar, to rotate the brake-wheel when themovement of the clamping-bar is arrested by the paper to be cut.

9. In a paper-cutting machine, the combiact on said brake-wheel,a clutchdevice adapt- I ed to act on the brake-wheehmeans to actuate said clutchdevice, a pinion on the clamp-' ing-bar for operating said means toactuate the clutch device, and means operated by the movement of theknife-bar and controlled by the movement of the clamping-bar to actuatesaid pinion,=when the movement of the clamping-bar is arrested. 7

10. In a paper-cutting machine, the combination with the reciprocatingknife-bar and knife, of a, reciprocating clamping-bar and clamp operatedby the knife-bar, a brake wheel carried by the clamping-bar, a brake.carried by the clamping-bar and, adapted to act on said brake-wheel,a'pivoted segment carried by the clamping-bar and adapted to be operatedby the knife-bar when the movement of the clamping-bar is arrested, apinion engaging said segment, a clutch-frame arranged adjacent to saidbrake-wheel, movable clutches carried by said clutch-frame and adaptedto engage the brake-wheel,and means operated by the pinion to controlsaid clutches and throw them into engagement with thebrake-Wheel whensaid pinion is operated in one direction and to release them when thepinion is operated in the other direction.

11. In a paper-cutting machine, the combination with the reciprocatingknife-bar and knife, of a reciprocating clampingbar and clamp operatedby the knife-bar, a brakewheel carried by the clamping-bar, a brakecarried by the clamping-bar and adapted to act on said brake-wheel, apivoted segment carried by the clamping-bar and adapted to be operatedby the knife-bar when the movement of the clamping-bar is arrested, apinion engaging said segment, a clutch-frame arranged adjacent to saidbrake-wheel, movable clutches 2' carried by said clutch-frame l I I

